US 10,889,362 B2Granted

Strut mounted gear box for counter rotating propellers

OwnerPeter R. Stolperinventor

Life of this patent

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Abstract

A strut mounted gear box for counter rotating propellers. The gear box is strut mounted for securement to the hull of a boat. A main input shaft is coupled to a propulsion component of a boat with a distal end secured to an idler gear cage assembly located within the gear box. The main input shaft transfers torque and rotation from the propulsion component to an idler gear cage assembly. An inner tail shaft is coupled to the main input shaft and arranged to rotate the inner tail shaft in a first direction. A counter shaft is coupled to the idler gear cage assembly and arranged to rotate the counter shaft in a second direction. A first propeller is secured to the inner tail shaft providing rotation in the first direction; and a second propeller is secured to the counter shaft allowing rotation in the second direction.

Claims7

Dependent claims

A strut mounted gear box for counter rotating propellers comprising:

a gear box (4), said gear box (4) having a conical shaped housing with a strut (32) extending from a side surface (34), said strut (32) secured to a hull (36) of a boat;
a main input shaft (2) having a proximal end (38) coupled to a propulsion component (50) and a distal end (40) secured to a idler gear cage assembly (30) located within said gear box (4), said main input shaft (2) for transferring torque and rotation from the propulsion component (50) to the idler gear cage assembly (30);
an outer shaft casing (1) coupled to said gear box (4), said main input shaft (2) postioned within said outer shaft casing (1), said outer shaft casing filled with a lubricant;
a inner tail shaft (16) coupled to said main input shaft (2) arranged to rotate said inner tail shaft (16) in a first direction;
a counter shaft (15) coupled to said idler gear cage assembly (30) constructed and arranged to rotate said counter shaft (15) in a second direction;
a first propeller (60) secured to said inner tail shaft (16) providing rotation in the first direction;
and a second propeller (62) secured to the counter shaft (15) having rotation in the second direction.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/466,312Filed 22 Jun 2017 · us provisional application
Priority: 7 Dec 2016
Published: US 2020/0070944 A15 Mar 2020
Granted: 12 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B63H 5/10
Of more than one propeller: of coaxial type, e.g. of counter-rotative type
B63H 23/06
With mechanical gearing: for transmitting drive from a single propulsion power unit
B63H 23/02
Transmitting power from propulsion power plant to propulsive elements: with mechanical gearing
B63H 23/321
Other parts: bearings or seals specially adapted for propeller shafts